JMeter Header add and remove programmatic:

BeanShell PreProcessor to the sampler

import org.apache.jmeter.protocol.http.control.Header;

sampler.getHeaderManager().removeHeaderNamed("Authorization");

or

bean shell postprocessor

import org.apache.jmeter.protocol.http.control.Header;
sampler.getHeaderManager().remove(1);

https://stackoverflow.com/questions/34724080/jmeter-header-manager-remove-header